52 research outputs found
TouchPhoto: Enabling Independent Picture Taking and Understanding for Visually-Impaired Users
No full textThis paper presents TouchPhoto, which provides visualaudio- tactile assistive features to enable visually-impaired users to take and understand photographs independently. A user can take photographs under auditory guidance and record audio tags to aid later recall of the photographs' contents. For comprehension, the user can listen to audio tags embedded in a photograph while touching salient features, e.g., human faces, using an electrovibration display. We conducted two user studies with visually-impaired users, one for picture taking and the other for understanding and recall, in a two-month interval. They considered auditory assistance as very useful for taking and understanding photographs and tactile features as helpful but to a limited extent. © 2019 Copyright held by the owner/author(s).1
TouchPhoto: Enabling Independent Picture-taking and Understanding of Photos for Visually-Impaired Users
No full text1
Emotional Responses of Vibrotactile-Thermal Stimuli: Effects of Constant-Temperature Thermal Stimuli
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Perceived Magnitude Function of Friction Rendered by the Dahl Model
No full textThe discrete vectorial Dahl model, proposed by Hayward and Armstrong, is appropriate for haptic friction rendering using a force-feedback interface due to its modeling power of complex frictional behaviors and relatively simple discrete formula favorable for real-time computation. The model has a few parameters that determine the subjective sensations of virtual surface friction, but their perceptual roles have not been clarified. This paper presents the design and results of a perceptual experiment that aimed to quantify the effects of the discrete vectorial Dahl model parameters in the perceived magnitude of friction. It was observed that the maximum magnitude of the sliding friction force has the most critical effect on friction perception. We also fit a nonlinear function between the perceptual magnitude of friction and the maximum sliding friction force in the form of Steven's power law. This function serves as a psychophysical magnitude function that enables haptic application designers to understand the perceptual strength of virtual friction rendering implemented using the Dahl model.1
Perception of Electrostatic Friction Stimuli in Free Surface Exploration
No full textAssuming the use scenario of free exploration on tactile graphics for people with visual impairments, this study investigated how the users perceive electrostatic friction stimuli on contour-based graphical information. We designed and conducted two experiments with 16 participants (8 visually-impaired and 8 sighted). First, we obtained spatial gap detection thresholds between two lines rendered using the electrostatic display. Second, we investigated spatial numerosity judgement on rendered lines on the display. Results demonstrated that the visually-impaired and sighted participants had similar perceptual performance. We summarize the findings and present suggestions for tactile graphics on an electrostatic friction display.1
Yongjae Ch’onghwa 慵齋叢話 (Yongjae Narratives)
No full textThe Yongjae ch’onghwa, a literary miscellany composed in the late 15th and early 16th century by the prominent scholar and official Sŏng Hyŏn (1439‑1504), allows us to “see behind the curtains” to get a sense of the lives, interests, and values of late Koryŏ and early Chosŏn elites. The author provides many anecdotes about the men and women of his place and time, including many humorous tales about foolish men and about sexual escapades. He also gives us fascinating descriptions of interactions between Korean literati and Chinese envoys, tells us much about how certain institutions functioned, discusses the persistence of Buddhism among the official class and the royal family, and provides interesting information about such aspects of material culture as printing technology and the manufacture of paper and porcelain. The material contained in this text often contradicts the impressions we get from official sources and can enable us to construct new social and cultural understandings of this period.Le Yongjae Ch’onghwa, un recueil de textes littéraires disparates composé à la fin du xve siècle et au début du xvie siècle par le célèbre lettré fonctionnaire Yongjae Sŏng Hyŏn (1439‑1504), nous permet de « voir derrière les rideaux » afin de saisir une part de la signification des vies, centres d’intérêt et valeurs des élites de la fin du Koryŏ et du début du Chosŏn. L’auteur nous offre de nombreuses anecdotes à propos des hommes et des femmes de ce pays et de cette époque, comprenant histoires humoristiques de personnages ridicules et frasques sexuelles. Il livre des descriptions saisissantes des relations entre lettrés coréens et les émissaires chinois ; il nous raconte des aspects du fonctionnement des institutions ; discute de la persistance du bouddhisme au sein de la classe des les lettrés fonctionnaires et de la famille royale ; il fournit des informations intéressantes sur des aspects de la culture matérielle tels que les techniques d’imprimerie et la fabrication du papier et de la porcelaine. Le contenu de ce recueil contredit souvent les impressions données par les sources officielles, et nous rend capable d’élaborer une compréhension renouvelée de la société et de la culture de cette période
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